AR-B1474 User
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s Guide
3-4
3.2.4 FDD Port Connector (CN2)
The AR-B1474 provides a 34-pin header type connector for supporting up to two floppy disk drives.
To enable or disable the floppy disk controller, please use BIOS Setup program to select.
1
2
33
34
Figure 3-7 CN2: FDD Port connector
Pin
Signal
Pin
Signal
1-33(odd)
GROUND
18
-DIRECTION
2
-Reduce Write Current
20
-STEP OUTPUT PULSE
4
Not used
22
-WRITE DATA
6
Not used
24
-WRITE ENABLE
8
-INDEX
26
-TRACK 0
10
-MOTOR ENABLE A
28
-WRITE PROTECT
12
-DRIVE SELECT B
30
-READ DATA
14
-DRIVE SELECT A
32
-SIDE 1 SELECT
16
-MOTOR ENABLE B
34
-DISK CHANGE
Table 3-2 FDD Pin Assignment
3.2.5 Parallel Port Connector (CN3)
To use the parallel port, an adapter cable has been connected to the CN3 (26-pin header type) connector. This
adapter cable is included in your AR-B1474 package. The connector for the parallel port is a 25-pin D-type female
connector.
1
2
1
14
13
25
D-Type Connector
Parallel Port Connector
25
26
Figure 3-8 CN3: Parallel Port Connector
CN3
DB-25
Signal
CN3
DB-25
Signal
1
1
-Strobe
2
14
-Auto Form Feed
3
2
Data 0
4
15
-Error
5
3
Data 1
6
16
-Initialize
7
4
Data 2
8
17
-Printer Select In
9
5
Data 3
10
18
Ground
11
6
Data 4
12
19
Ground
13
7
Data 5
14
20
Ground
15
8
Data 6
16
21
Ground
17
9
Data 7
18
22
Ground
19
10
-Acknowledge
20
23
Ground
21
11
Busy
22
24
Ground
23
12
Paper Empty
24
25
Ground
25
13
Printer Select
26
--
No Connect
Table 3-3 Parallel Port Pin Assignments
